What does a standard score measure A the mean plus variance

What does a standard score measure? A) the mean plus variance. B) the number of standard deviations from the mean C) the mean plus the variance. D) the squareroot of the mean plus the variance. E) the number of standard deviations from the variance

Solution

23.(B) A standard score measure the number of standard deviation from mean.

Standard score also called z-score measures the number of S.D ( standard deviation) below or above the population mean. And it can be placed on normal distribution curve. And it is a signed number of S.D.

For example:

we have given value of z-score is -3.1.

it means standard deviation is 3.1 below ( due to -ve sign) the mean.

Thus it measure S.D from mean.